Improvement in stuffing-boxes for piston-rods



J. S. REED.

Improvement in StuffingBoxes for Piston-Rods, &c.

No. 128,966, Patentedluly 9,1872.

Se ale F1131 Size.

ATTEET. TNVENTUH.

/ (I, In

Md aw 0 R M71.

UNITED S ATES JOHN S. REED, OF ST. LOUIS, MISSOURI.

PATENT OFFICE.

IMPROVEMENT IN STUFFING-BOXES FOR PISTON-RODS, &c.

Specification describing a certain Improvement in Stuffing-Boxes, invented by J OHN S. REED, of the city and county of St. Louis and State of Missouri.

My invention relates to the construction of the stoning-boxes of steam, air, or water engines, blowers, meters, &c.; and consists in making the packing-chamber of outwardlydecreasing diameter, (as shown,) so that the pressure from the interior of the cylinder, &c.,

will force the packing outward toward the contracted part of the stufling-box and against the rod or shaft.

The drawing is an axial section of my iniprovcment applied to a common reciprocating steam-engine.

A is a partof the piston rod, and B of the cylinderhead. U is an ordinary standing-box, into whose flange a screw the bolts or studbolts 1). E is a cap held down by the bolts D, and retaining the bush or box F, which is made to snugly lit the interior of the box 0, and has an inside cavity, f, of conical or cuplike form, constituting the paclting chambcr. The exact form of the packing-chamber is not material, so that its diameter is larger toward the side of greater pressure, which will cause the steam, 85s., to force the packing upward toward the contracted part of the chamber to tightly embrace the piston-rod.

M y improvement is applicablealike to steam, air, or water engines, and to blowers and meters, and in almost any posit-ion where a stufflog-box is required for a piston-rod or shaft.

I have-shown myimprovcmentas applied to a shining-box of ordinary construction; but it is evident thatthe arrangement admits of modification without in any way changing the principle of operation brought into action by my improvement. For instance, the lower end of the box or bush F may be made to fit tightly on the cylinder'hcad by means of a gasket or ground-joint, and the box 0 may be dispensed with.

The operation of my box is as follows: When the working steam, air, &c., is above the piston, (that is, between the piston and striding-bong) it (the steam, kc.) enters the smiling-box beneath the packing and forces the latter upward, preventing any leakage between the piston and packing; but when the steam is in the chamber (of the cylinder) beneath the piston, the packing is relieved from steam-pressure, and the rod from friction in the shutting-box, caused by said pressure.

I claim- ,The combination of the gland F having an inside cavity, f, of a conical or cup-like form, with stutting-box O, follower E, and packing, constructed and operated as set forth.

JOHN S. REED.

Witnesses: r

SAML. Kmen'r, J. E. RUSSELL. 

